Lyn
My thanks to Rosemary (Tess DB) on the WetCanvas Forum for demonstrating how to draw a quadruple Celtic spiral.
Using her pattern, I placed wool yarn onto both sides of my flat, circular resist before adding the layers of white wool, and the quadruple spiral can clearly be seen on the bottom of the pod ...
... and on the top of the pod, even though I cut out the middle bit during the making ...
... but alas, the quadruple spiral isn't visible from the traditional side view of the pod :(
Still, never mind, I do enjoy making pods and there are lots more decorative ideas to try I'm sure!